Staging: lustre: ptlrpc: Declare sptlrpc_rule_set_expand as static

Declare sptlrpc_rule_set_expand as static since it is accessed from this
particular file only. Also remove its declaration from
header file
Signed-off-by: Shraddha Barke <shraddha.6596@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/lustre/lustre/include/lustre_sec.h

@@ -329,7 +329,6 @@ static inline void sptlrpc_rule_set_init(struct sptlrpc_rule_set *set)
 	memset(set, 0, sizeof(*set));
 }
 
-int  sptlrpc_rule_set_expand(struct sptlrpc_rule_set *set);
 int sptlrpc_rule_set_choose(struct sptlrpc_rule_set *rset,
 			    enum lustre_sec_part from,
 			    enum lustre_sec_part to,

drivers/staging/lustre/lustre/ptlrpc/sec_config.c

@@ -229,7 +229,7 @@ static void sptlrpc_rule_set_free(struct sptlrpc_rule_set *rset)
 /*
  * return 0 if the rule set could accommodate one more rule.
  */
-int sptlrpc_rule_set_expand(struct sptlrpc_rule_set *rset)
+static int sptlrpc_rule_set_expand(struct sptlrpc_rule_set *rset)
 {
 	struct sptlrpc_rule *rules;
 	int nslot;